Security Will Be Tighter Today At The Greeneville Police Department After A Man Walked Into Building Carrying Two Large Knifes And Threatened Officers. It Took Police Negotiators About 30 Minutes To Get Darius Brown To Give Up. Two Backpacks Were Also Found In The Parking Lot, They Were Secured By The Explosive Ordinance Disposal Unit. Brown Is Charged With One Count Of Aggravated Assault.